Animation doesn't work in blender with a rigged object
If there is an orange bar between two keyframes, this means that nothing changes between those keyframes. That's why you cannot see an animation because you animated &quot;nothing&quot; because both values for different times(keyframes) are the same.
If you want to keyframe the offset, you do this by hovering with the mouse over the offset value and press &quot;I&quot;. Then change the keyframe and the offset value and press &quot;I&quot; again when the mouse is hovering over it.
It is something totally different if you press &quot;I&quot; in the 3D View. Then you can choose what you want to keyframe: Location, Rotation, Scale or combinations of these. Because you keyframed LocRotScale and then changed the offset and hit &quot;I&quot; again in 3D View - you keyframed the same location, rotation, scale again - which makes no sense.